An advertising manager is interested in whether having a celebrity chef in a commercial for cookware will influence audience's perceptions of the product. Her thinking is that a celebrity chef may improve the product image, but it may also distract the audience and make them think the product was less useful. It is known from the prior focus groups that the average usefulness of the cookware was 45, and the standard deviation was 21. The manager had a new group of 49 volunteers watch the new commercial with Justin Warner (yes, he is a famous celebrity chef in case you are wondering...), and then asked them to rate the usefulness of the cookware. The average score of the 49 volunteers was 54.

Assuming the alpha level of .01, determine the cutoff score on the comparison distribution at which the null hypothesis will be rejected.

Question 2 options:

-1.96

-2.58

+2.33

+1.96

+ or -2.33

+2.58

+ or - 2.58

-2.33

+ or - 1.96

Question 3(1 point)

Question 3 options:

Expected _M1=

Question 4(1 point)

Figure out power

Question 4 options:

100%

50%

46.86%

3.14%

96.86%